package com.atguigu.gulimall.member.config;

import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

/**
 * @Description: feign拦截器功能
 * @Created: with IntelliJ IDEA.
 * @author: fangdada
 * @createTime: 2020-07-02 21:10
 **/

@Configuration
public class GuliFeignConfig {

    @Bean("requestInterceptor")
    public RequestInterceptor requestInterceptor() {

        RequestInterceptor requestInterceptor = template -> {
            //1、使用RequestContextHolder拿到刚进来的请求数据
            ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();

            if (requestAttributes != null) {
                //老请求
                HttpServletRequest request = requestAttributes.getRequest();

                if (request != null) {
                    //2、同步请求头的数据（主要是cookie）
                    //把老请求的cookie值放到新请求上来，进行一个同步
                    String cookie = request.getHeader("Cookie");
                    template.header("Cookie", cookie);
                }
            }
        };
        return requestInterceptor;
    }

}
